            &        reg1   &        reg2   &        reg3   &        reg4   \\
            &        b/se   &        b/se   &        b/se   &        b/se   \\
2.treat     &      -0.177   &      -0.177   &      -0.176   &      -0.176   \\
            &     (0.151)   &     (0.150)   &     (0.152)   &     (0.151)   \\
3.treat     &      -0.070   &      -0.068   &      -0.068   &      -0.068   \\
            &     (0.217)   &     (0.217)   &     (0.215)   &     (0.220)   \\
4.treat     &      -0.037   &      -0.036   &      -0.036   &      -0.036   \\
            &     (0.201)   &     (0.200)   &     (0.199)   &     (0.185)   \\
sbj_thresh  &               &               &               &       0.000   \\
            &               &               &               &     (0.000)   \\
_cons       &       5.069***&       5.590***&       5.046***&       5.039***\\
            &     (0.389)   &     (0.113)   &     (0.069)   &     (0.226)   \\
